[INFO] cloning repository https://github.com/wmmnola/Lambda_Calculus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wmmnola/Lambda_Calculus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwmmnola%2FLambda_Calculus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwmmnola%2FLambda_Calculus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8924441f9a07c1a8e050cb35fd66472df871b6ad
[INFO] checking wmmnola/Lambda_Calculus against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwmmnola%2FLambda_Calculus" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wmmnola/Lambda_Calculus on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wmmnola/Lambda_Calculus
[INFO] finished tweaking git repo https://github.com/wmmnola/Lambda_Calculus
[INFO] tweaked toml for git repo https://github.com/wmmnola/Lambda_Calculus written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/wmmnola/Lambda_Calculus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a48ca4e6e19e581b072d836444a9ab13c32821c92f7af8bd2eaf8436d31418f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0a48ca4e6e19e581b072d836444a9ab13c32821c92f7af8bd2eaf8436d31418f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a48ca4e6e19e581b072d836444a9ab13c32821c92f7af8bd2eaf8436d31418f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a48ca4e6e19e581b072d836444a9ab13c32821c92f7af8bd2eaf8436d31418f", kill_on_drop: false }`
[INFO] [stdout] 0a48ca4e6e19e581b072d836444a9ab13c32821c92f7af8bd2eaf8436d31418f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c7f32eb53b1302d733ec4861fd6a0d2083a020aac3379806eda8f1220a0e9c4
[INFO] running `Command { std: "docker" "start" "-a" "7c7f32eb53b1302d733ec4861fd6a0d2083a020aac3379806eda8f1220a0e9c4", kill_on_drop: false }`
[INFO] [stderr]     Checking Lambda_Calculus v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `nest_level`
[INFO] [stdout]   --> src/main.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn parse(input:&Vec<char>, nest_level: i32) -> bool{
[INFO] [stdout]    |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nest_level`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nest_level`
[INFO] [stdout]   --> src/main.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn parse(input:&Vec<char>, nest_level: i32) -> bool{
[INFO] [stdout]    |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nest_level`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut f = Function::Function{variable: var, operation: op, nestlevel:1};
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut f = Function::Function{variable: var, operation: op, nestlevel:1};
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Lambda_Calculus` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lambda_calculus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Function` should have a snake case name
[INFO] [stdout]  --> src/main.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod Function;
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `function`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Lambda_Calculus` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lambda_calculus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Function` should have a snake case name
[INFO] [stdout]  --> src/main.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod Function;
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `function`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "7c7f32eb53b1302d733ec4861fd6a0d2083a020aac3379806eda8f1220a0e9c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c7f32eb53b1302d733ec4861fd6a0d2083a020aac3379806eda8f1220a0e9c4", kill_on_drop: false }`
[INFO] [stdout] 7c7f32eb53b1302d733ec4861fd6a0d2083a020aac3379806eda8f1220a0e9c4